sea breeze or onshore breeze is any wind that blows from a large body of water toward or onto a landmass; it develops due to differences in air pressure created by the differing heat capacities of water and dry land. As such, sea breezes are more localised than prevailing winds. Because land absorbs solar radiation far more quickly than water, a sea breeze is a common occurrence along coasts after sunrise.
At night the land cools faster than the sea. Heat radiates off the warmer land, cools falls and continues out to sea. This stats a circulation and so there will be a light offshore breeze. This wind can be strengthened if there are high hills around where the temperature falls faster at height.